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EXPENSES BY NATURE - Classified by nature (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
EXPENSES BY NATURE      
Depreciation and amortisation R$ (2,499,104) R$ (2,074,295) R$ (1,891,814)
Labor expenses (5,867,265) (5,175,373) (5,724,352)
Raw material and consumption material (26,945,440) (25,890,618) (29,623,418)
Freight (2,572,293) (2,300,439) (2,770,516)
Impairment of non-financial assets (411,925) 0 0
Gains and losses on assets held for sale and sales of interest in subsidiaries 0 0 (414,507)
Other expenses/income, net (476,818) (1,002,301) (1,697,786)
Total Expenses R$ (38,772,845) R$ (36,443,026) R$ (42,122,393)